Visitors to Niagara Falls snapped pictures of the majestic sights and still waters Sunday.

Emma Grafham told CNN she felt like she was in "Elsa's castle."

"There was even this set of stairs that were placed just outside the look-on spot and they had so much ice on them, it looked like Elsa had just cast her arm out and summoned up some stairs like she does in the movie," she said.